Application of Digital Holography for Nondestructive Testing and Metrology: A Review

Holography and holographic interferometry as a means for nondestructive testing, as well as metrologic tools in engineering, biology, and other fields, have significant momentum by the introduction of digital holography (DH) and further by the employment of numerical processing power, which became available due to the increase in speed and data capacity of modern computers. In this review paper, we present the basics of holography, holographic interferometry, and DH, and give examples from such diverse fields as deformation analysis, form determination, refractive index measurement, and wave front reconstruction by shearographic differential interference contrast microscopy.